How does traffic go in voip applications?

Question

VPN

There are a lot of voip applications, both world famous and written specifically for some kind of za**rma. How reliable is this thing in terms of traffic leakage? i.e. if vpn is enabled on the hardware and all traffic is wrapped in this vpn ... does the voip application itself merge your real ip? It just amuses the inscriptions about the secure wbrtc technology (which leaks your ip address even if you use vpn). So don't voip applications use something like this?!

Answer 1

if vpn is enabled on the hardware and all traffic is wrapped in this vpn...

Well, if your traffic is wrapped in a VPN, then voice traffic will go there too.
Unless, of course, you wrapped it normally, for example, on a router.

does the voip application itself leak your real ip

And what is real ip in your understanding?
If the real ip is the address on the interface - well, of course, the application can merge it, but usually it is a gray address.
If the real ip is the one from which you access the Internet - when using a VPN, this is the address of your VPN server. Everyone sees it anyway, why should it be somehow merged.

Answer 2

they don’t like proxies precisely because of the
speed,
therefore VPN is needed on the margrutizer, and not on one of the networks

Answer 3

Usually people want the opposite, so that the traffic goes directly, and not through the servers of corporations that unconditionally decrypt all transit traffic. But don't worry, most modern voip applications exist precisely to sniff your traffic and the tone of your voice is more important to them than ip addresses.
A proprietary application can always transfer a bunch of information to the servers and not only real Ip-addresses, but in general any information available to it. For example, on phones, they are very fond of tyrit contact list. Naturally, they do not leak your ip to other clients, there is no need. But there are also such as webrtc, aimed at direct communication, and here the exchange of addresses is a necessity. And the browser simply does not know that you have a VPN somewhere.
The answer generally depends on the specific application. But I don't know any projects aimed at completely anonymous voip. Here you need a fierce custom based on tor and .onion.